118 lines
3.8 KiB
PHP
118 lines
3.8 KiB
PHP
<?php
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defined('ABSPATH') or die(); // Exit if accessed directly
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/**
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* Captcha image
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*/
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class Nasa_Captcha {
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private $img_width = 120;
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private $img_height = 30;
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private $font_path = ELESSI_THEME_PATH . '/assets/captcha-fonts'; // Path file text
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private $fonts = array();
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private $font_size = 15;
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private $char_set = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
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private $char_length = 5;
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private $char_color = "#880000,#008800,#000088,#888800,#880088,#008888,#000000";
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private $char_colors = array();
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private $line_count = 10;
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private $line_color = "#DD6666,#66DD66,#6666DD,#DDDD66,#DD66DD,#66DDDD,#666666";
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private $line_colors = array();
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private $bg_color = '#FFFFFF';
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public function __construct($length = 5, $width = 120, $height = 30) {
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$this->char_length = $length;
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$this->img_width = $width;
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$this->img_height = $height;
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}
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// Init Setting
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// return code and Show Img
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public function get_and_show_image($override = array()) {
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/**
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* Check missing Grab function list
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* GD Library
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*/
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if (!function_exists('imagecreatetruecolor')) {
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return null;
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}
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// Override default config
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if (is_array($override)) {
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foreach ($override as $key => $value) {
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if (isset($this->$key)) {
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$this->$key = $value;
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}
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}
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}
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// Create list colors to Array
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$this->line_colors = preg_split("/,\s*?/", $this->line_color);
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$this->char_colors = preg_split("/,\s*?/", $this->char_color);
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// Get fonts font_path
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$this->fonts = $this->collect_files($this->font_path, "ttf");
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// Init IMG
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$img = imagecreatetruecolor($this->img_width, $this->img_height);
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imagefilledrectangle($img, 0, 0, $this->img_width - 1, $this->img_height - 1, $this->gd_color($this->bg_color));
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// Draw random
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for ($i = 0; $i < $this->line_count; $i++) {
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imageline($img, rand(0, $this->img_width - 1), rand(0, $this->img_height - 1), rand(0, $this->img_width - 1), rand(0, $this->img_height - 1), $this->gd_color($this->line_colors[rand(0, count($this->line_colors) - 1)])
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);
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}
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// Draw code
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$code = "";
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$y = intval(($this->img_height / 2) + ($this->font_size / 2));
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for ($i = 0; $i < $this->char_length; $i++) {
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$color = $this->gd_color($this->char_colors[rand(0, count($this->char_colors) - 1)]);
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$angle = rand(-30, 30);
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$char = substr($this->char_set, rand(0, strlen($this->char_set) - 1), 1);
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$sel_font = $this->fonts[rand(0, count($this->fonts) - 1)];
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$font = $this->font_path . "/" . $sel_font;
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$x = intval(($this->img_width / $this->char_length) * $i + ($this->font_size / 2));
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$code .= $char;
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imagettftext($img, $this->font_size, $angle, $x, $y, $color, $font, $char);
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}
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// Show image
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header('content-type: image/jpg');
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imagejpeg($img);
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imagedestroy($img);
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return strtolower($code);
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}
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// Change color
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protected function gd_color($html_color) {
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$rgb = array();
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return preg_match('/^#?([\dA-F]{6})$/i', $html_color, $rgb) ? hexdec($rgb[1]) : false;
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}
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// get list files (ext)
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protected function collect_files($dir, $ext) {
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if (false !== ($dir = opendir($dir))) {
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$files = array();
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while (false !== ($file = readdir($dir))) {
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if (preg_match("/\\.$ext\$/i", $file)) {
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$files[] = $file;
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}
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}
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return $files;
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}
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return false;
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}
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}
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